Drive system and remote control

Abstract

A drive system and remote control for a light electric vehicle. The drive system includes a power unit, a main gearing connected to the power unit and a remote control connect to the power unit. The power unit includes an assist motor arranged to provide torque output to a torsion shaft of the light electric vehicle, and a control motor arranged to adjust transmission ration of the main gearing. The remote control further includes an operating switch arranged to switch the remote control between a first and a second operating state for controlling the assist motor and control motor, respectively.

The invention claimed is: 
     
       1. A drive system for a light electric vehicle, the drive system comprising:
 a power unit for driving the light electric vehicle; 
 a main gearing connected to the power unit for controlling a transmission ratio of the power unit; and 
 a remote control connected to the power unit for operating the power unit, the remote control comprising an actuator arranged to operate the power unit, and 
 the power unit comprising an assist motor arranged to provide torque output to a torsion shaft of the light electric vehicle, and a control motor arranged to adjust transmission ratio of the main gearing, 
 wherein the remote control comprises: 
 an operating switch arranged to switch the remote control between a first operating state and a second operating state, in the first operating state the actuator is connected to the assist motor and arranged to adjust the torque output of the assist motor, and in the second operating state the actuator is connected to the control motor and arranged to adjust the transmission ratio of the main gearing, 
 wherein the main gearing comprises an epicyclic gear set comprising a sun gear, a ring gear, plurality of planet gears between the sun gear and the ring gear and a planet carrier connected to the planet gears and arranged to receive rotation of the torsion shaft, and that: 
 the control motor is connected to the ring gear of the epicyclic gear set, the torsion shaft is connected to the sun gear of the epicyclic gear set, and the assist motor is connected to the sun gear of the epicyclic gear set; or the control motor is connected to the sun gear of the epicyclic gear set, the torsion shaft is connected to the planet carrier of the epicyclic gear set, and the assist motor is connected to the ring gear of the epicyclic gear set. 
 
     
     
       2. The drive system according to  claim 1 , wherein:
 the remote control is wirelessly connected to the power unit; or 
 the remote control is connected to the power unit with a communication line. 
 
     
     
       3. The drive system according to  claim 1 , wherein the remote control comprises a control unit connected to the actuator and arranged to provide control signals as response to actuation of the actuator. 
     
     
       4. The drive system according to  claim 1 , wherein:
 the actuator comprises a mechanical actuator element for actuating the actuator; or the actuator comprises an electronic actuator element for actuating the actuator. 
 
     
     
       5. The drive system according to  claim 1 , wherein the remote control comprises:
 a main body provided with a control unit and the actuator is connected to the main body; or 
 a main body provided with the control unit and a separate actuator body connected to the main body; or 
 a main body provided with the control unit and a separate actuator body detachably connected to the main body. 
 
     
     
       6. The drive system according to  claim 5 , wherein:
 the actuator element is provided to the separate actuator body, and the operating switch is provided to the main body; or 
 the actuator element is provided to the separate actuator body, and the operating switch and the control unit are provided to the main body; or 
 the actuator element is provided to the separate actuator body, and the operating switch is provided to the separate actuator body; or 
 the actuator element and the operating switch are provided to the separate actuator body, and the control unit is provided to the main body. 
 
     
     
       7. The drive system according to  claim 1 , wherein:
 the operating switch comprises a first mode position in which the remote control is in the first operating state, and a second mode position in which the remote control is in the second operating state; or 
 the operating switch comprises a first switch element arranged to switch the operating switch in a first mode position in which the remote control is in the first operating state, and a second switch element arranged to switch the operating switch in a second mode position in which the remote control is in the second operating state. 
 
     
     
       8. The drive system according to  claim 1 , wherein:
 the operating switch comprises a mechanical operating switch or the operating switch comprises an electronic operating switch.